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Family Annonaceae
Platymitra arborea (Blanco) P.J.A.Kessler

Scientific names   Common names  
Alphonsea arborea (Blanco) MERR. Bolon (Bik.)
Alphonsea philippinensis Merr. Kalai (Tag.)
Macahanea arborea Blanco Kalay (Tag.)
Monocarpia blancoi Fern.-Vill.                       Lanotan (S. L. Bis.)
Monodora myristica Blanco Lanutan (Tag., Bik.)
Platymitra arborea (Blanco) Kessler Malatambon (Bik.)
  Mempisang (Trade name)
  Palokalai (Tag.)
  Sapiro (C. Bis.)
Lanutan is a common name shared by: (1) Kalai, Alphonsea arborea (2) Malaatis, Dasymaschalon clusiflorum (3) Kalimatas, Phaenthus ebracteolatus, and (4) Duhat-matsing, Polyalthia suberosa.
Platymitra arborea is an accepted species. KEW: Plants of the World Online

Gen info
- Platymitra is a genus of flowering plants in the family Annonaceae.
- There are two species: Platymitra arborea (Blanco) Kessler and P. macrocarpa Boerl.

Kalai is a tall forest tree growing to a height of 40 meters with a diameter of 70 centimeters. Leaves are ovate-oblong, 10 to 15 centimeters long, 2 to 3 centimeters wide, with a pointed base and tip. Inflorescence is lateral on short hairy stalks. Flowers are small, yellow and odorless. Sepals are short, with petals about 6 millimeters long. Fruit is brown, usually single, large, hard and woody, ellipsoid or subglobose, 6 to 9 centimeters long.

- Native to the Philippines.
- Scattered in primary lowland rain forests, up to 300 m.

- Considered febrifuge, emmenagogue and anti-dysenteric.
- Studies have suggested antimicrobial and cytotoxic properties.

Parts utilized
Fruit, leaves and bark.

Ripe fruit is edible; eaten raw.
- Boiled fruit used for fevers.
- Decoction of fruit used for amenorrhea.
- Decoction of bark with dried leaves of garlic used for urticaria.
- Decoction of fruit used as antidysenteric.
- Decoction of bark used for diabetes.
- Wood: Non-durable; not resistant to dry-wood termites and fungal attack. Used for making baseball bats, bowling pins, furniture
and cabinets, tools, musical instruments, matches, etc. 

Study evaluated 848 extracts from 108 species of Philippine plants from 44 families using eight solvents. Sixty-two or 58% showed inhibitory activity to Bacillus subtilis, Micrococcus aureus, E. coli, and Mycobacterium tuberculosis. Alphonsea arborea was one of nine plants that showed exceptionally high values of antimicrobial activity.
Cytotoxicity Against Human Cancer Cell Lines: Study evaluated crude extracts of three Philippine medicinal plants, Wrightia pubescens, Aphanamixsis polystachya, and Platymira arborea against selected human cancer cell lines using MTT assay. Cytotoxic activities were found in the ethyl acetate fractions of P. arborea and W. pubescens and hexane fraction of A. polystachya. All active fractions were highly cytotoxic to HCT116 and A549.

- Wild-crafted.
- Ornamental cultivation.

Updated November 2023 / April 2020 / June 2017 / February 2015

IMAGE SOURCE Photograph: Platymitra arborea - BOLON / 2 tree images: 10 years of growth / © Albert Balbutin Jr. / Non-commercial use / click on image or link to go to source page / filipeanut.art
Additional Sources and Suggested Readings
Medicinal Plants Research in Asia - Volume I / Batugal PA, Kanniah J, Sy L, Oliver JT
nvestigation of some Philippine plants for antimicrobial substances. / Edna V. Ramos, Roseanna M. De La Cruz, Victoria A. Masilungan, Flora B. Beloy / Philippine Journal of Science, Dec 1978, Vol 105, Issue 4, pp 205-214
Alphonsea arborea (Blanco) Merr. / KEW: Plants of the World Online Plant List
In-vitro Cytotoxicity of Wrightia pubescens (Blanco) Merr., Aphanamixis polystachya (Wall.) Parker, and Platymitra arborea (Blanco) against selected human cancer cell lines / Maria Lorraine Bugayong, Sonia Jacinto / International Journal of Bosciences, 2017 11(5): pp 204-213 / DOI: 10.12692/ijb/11.5.204-213
Mempisang (Platymitra arborea) / ITTO (Lesser Used Specied)

DOI: It is not uncommon for links on studies/sources to change. Copying and pasting the information on the search window or using the DOI (if available) will often redirect to the new link page. (Citing and Using a (DOI) Digital Object Identifier)

                                                            List of Understudied Philippine Medicinal Plants
                                          New plant names needed
The compilation now numbers over 1,300 medicinal plants. While I believe there are hundreds more that can be added to the collection, they are becoming more difficult to find. If you have a medicinal plant to suggest for inclusion, native or introduced, please email the info: local plant name (if known), any known folkloric medicinal use, scientific name (most helpful), and, if possible, a photo. Your help will be greatly appreciated.

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